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| 6.1 | Return. Upon completion of each use of the Aircraft by Lessee during the Term, Lessee shall return the Aircraft to the Lessor by delivering the same to the Operating Base, fully equipped with all Engines installed thereon. Upon each such delivery, the Aircraft shall be in as good operating condition as at it was in when Lessor delivered the Aircraft to Lessee, ordinary wear and tear excepted, and the United States standard airworthiness certificate issued for the Aircraft shall be present on board the Aircraft and said standard airworthiness certificate shall be effective in accordance with FAR 21.181(a)(1). Nothing contained in this Section 6.1 may be interpreted to require Lessee to perform any maintenance or other obligation which is the responsibility of the Lessor pursuant to Section 5.4 hereof; provided, however, that Lessee shall be obligated to ensure that Lessor is advised of any maintenance requirement, dangerous condition, malfunction or worn part that may be discovered during each period during the Term commencing with the delivery of the Aircraft to Lessee and terminating when the Aircraft has been redelivered to Lessor in the condition required hereunder.  |

  
SECTION 7. LIENS  


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| 7.1 | Lessee shall ensure that no Liens are created or placed against the Aircraft by Lessee or third parties as a result of Lessee's or its agents' or representatives' action or inaction. Lessee shall notify Lessor promptly upon learning of any liens not permitted by these terms. Lessee shall, at its own cost and expense, take all such actions as may be necessary to discharge and satisfy in full any such lien promptly after the same becomes known to it. |

  
SECTION 8. INSURANCE